Bump version from 0.1.89 to 0.1.90 (#206)

This PR prepares release v0.1.90.

After this PR is merged into `main`, run `./release.sh publish` from a
clean checkout to create the tag and GitHub release.

Author: svenmalvik

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "manifold",
-  "version": "0.1.89",
+  "version": "0.1.90",
   "description": "Multi-agent orchestrator for CLI coding agents",
   "main": "out/main/index.js",
   "scripts": {